47results about How to "Stable temperature gradient" patented technology

The invention relates to a method for preparing a thermoelectric device and a thermoelectric device, and provides a method for preparing a thermoelectric device. The method comprises the following steps: (a) providing a large number of thermoelectric material sheets or thermoelectric component sheets, wherein each sheet has at least one predetermined shape; (b) arranging the thermoelectric material sheets or thermoelectric component sheets into a predetermined combination, and connecting the thermoelectric material sheets or thermoelectric component sheets to form a thermoelectric material section or thermoelectric component section; (c) repeating step (b) to produce a large number of sections; and (d) connecting the large number of sections to produce a predetermined configuration for thermoelectric devices. The invention further provides a thermoelectric device.

The invention relates to a testing system for deep soil freezing / thawing process, which is structurally characterized in that a temperature-controlled box is connected with an external cold bath; a high pressure-resistant organic glass cylinder is arranged on a temperature-controllable steel base; two small holes are formed in the base, one is connected with a water guide pipe, and the other is connected with a pressure adjusting pipe; a permeable stone, a piece of filter paper and a sample are sequentially arranged at the upper part of the lower base, and a temperature sensor is mounted in the sample; a temperature-controllable upper press head is arranged at the upper part of the sample; a line leading-out hole is formed in the upper press head, and is sealed through sealant after the line is lead out; the upper press head is connected with the transmission rod of a testing machine; a measuring cylinder is connected with the sample through the water guide pipe; and the measuring cylinder is arranged on a weighing sensor and fixed through a bracket. By adopting the testing system, the freezing / thawing process of the deep soil can be rather systematically researched, so as to obtain the frost heaving rate and the water absorbing / draining rate of the deep soil which is in different depths frozen under the different temperature gradients. The testing system provides the technical guarantee for the research in clarifying the action of the external load on the forming processes of the freezing soil and the frozen soil cold-formed structures, and the mutual action of the temperature, the moisture content and the pressure of the soil body in the process of freezing under the high-pressure action.

The invention relates to a device and method for removing S impurities in yellow phosphorus through directional solidification through full melting, which includes a vertical heating device and a yellow phosphorus carrier, and also includes an annular cooler, and the annular cooler is located above the vertical heating device And it fits closely with the top of the vertical heating device. The yellow phosphorus carrier passes through the annular cooler from top to bottom and is inserted into the vertical heating device. The top of the yellow phosphorus carrier is hung on the motor shaft, and the motor is connected to the vertical slide. On the rail, a liquid level maintaining device is arranged on the upper part of the device, and the liquid level maintaining device is connected to the vertical heating device through a hose. The method and device melt all the materials to be removed, then let the materials solidify gradually from one end, use the difference in the segregation coefficient of impurities to enrich the impurities at both ends of the material, and finally remove the two ends of the material. The sulfur impurity removal rate in phosphorus is over 95%. The method and device have good sulfur removal effect, simple device, easy production, high safety, and no harmful substance discharge.

The invention provides a method and a device for coaxial combined machining with tubular electrode discharging and laser irradiation, and belongs to the field of non-traditional machining and combined machining. Micro-etching machining is performed on the surface of an insulating high-hardness brittle material by virtue of a coaxial action of cone-shaped tube electrode discharging and laser irradiation, recessive material defects and stress concentration generated by pulsed laser acting on the surface of a workpiece can attract spark discharge to always act on the current area, and meanwhile, the spark discharge changes the surface shape and physico-chemical property of the current area, then nonlinear absorption of the current area on laser energy is improved, a local field enhancement effect is generated, and pulsed laser focused irradiation can accelerate an electrochemical reaction to promote generation of a stable discharge gas film layer on the surface of a hollow tool electrode; and the interactive cooperation of two types of energy achieves fixed-area micro-etching of the insulating high-hardness brittle material, the machining efficiency is significantly improved, and the machining quality is improved.

The present invention relates to a method for preparing thermoelectric components and thermoelectric components, and provides a method for preparing thermoelectric components, the method comprising: (a) providing a large number of thermoelectric material sheets or thermoelectric element sheets, each sheet having at least one predetermined shape; (b) arranging a plurality of thermoelectric material sheets or thermoelectric element sheets into a predetermined combination, and connecting the plurality of thermoelectric material sheets or thermoelectric element sheets to form a thermoelectric material segment or thermoelectric element segment; (c) repeating steps (b) to produce a plurality of segments; and (d) joining said plurality of segments together to produce a predetermined configuration for the thermoelectric component. A thermoelectric element is also provided.

The invention relates to a fine particle thermophoretic deposition dedusting method and a system thereof. The system is mainly composed of a thermophoretic deposition deduster, a waste heat lithium bromide refrigeration system, a gas heating device and an electric appliance control system. According to the invention, dust-laden air flow flows into a gas insulating chamber from a dust-laden air-flow inlet, then is introduced into a square plane cold wall pipe under effect of an induced draught fan and performs thermophoretic deposition movement, the air flow flows out from the square plane cold wall pipe and then continuously and downwardly flows due to effects of inertia and negative pressure effects, then the air flow is discharged through an air-flow outlet 69 from a negative pressure chamber until the air flow at the bottom of a conical cylinder is slowly risen, and the air flow is introduced into an inlet of the induced draught fan, so that a purpose of separating gas and dust can be realized. The method takes on-site practical tests as a base, a theoretical equation is taken as a reference, the organic combination of the theoretical equation and the on-site practical tests makes that the control of the thermophoretic deposition system and the practical condition are matched, so that the deduster has high thermophoretic deposition rate. The lithium bromide waste heat is used for refrigeration, so that energy is saved, and the environmental protection is realized.

The invention relates to a dust removing method in the production process of metallurgical pellets, in particular to a dust removing system of a chain grate machine tail part. The dust removing system comprises a chain grating machine tail part mechanism with a chain grate machine wheel and a chain grate machine tail wheel return device; the dust removing system is characterized in that a machine tail seal cover is arranged on the chain grate machine tail part mechanism; chain grate machine tail wheel return segment dust removing devices are arranged on the upper part of the machine tail seal cover; an overall chain grate machine tail dust removing device is arranged in the middle part of the machine tail seal cover; and a tail sealing wind box dust removing device of the chain grate machine is arranged at the end part of the lower return of the chain grate machine tail. According to the dust removing system provided by the invention, as the chain grate machine tail wheel return segment dust removing devices are arranged at the three main dust-raising spots of the chain grate machine tail mechanism, and are connected with external exhaust fans by pipelines, thereby forming a negative pressure environment; the three dust removing systems are compensated to one another and are linked with one another, so that the high temperature waste gas can be effectively prevented from overflowing, the tail machine environment of the chain grate machine workshop can be improved, the service life of the heat resistant parts of the equipment can be ensured; and moreover, the temperature gradients of the materials are smoothed, and the mine return quantity of the cured pellets can be reduced.